40321005 has 16 divisors (see below), whose sum is σ = 65240640. Its totient is φ = 21262208.

The previous prime is 40320997. The next prime is 40321007. The reversal of 40321005 is 50012304.

It is a cyclic number.

It is not a de Polignac number, because 40321005 - 2³ = 40320997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40321007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13767 + ... + 16436.

It is an arithmetic number, because the mean of its divisors is an integer number (4077540).

Almost surely, 2^40321005 is an apocalyptic number.

It is an amenable number.

40321005 is a deficient number, since it is larger than the sum of its proper divisors (24919635).

40321005 is a wasteful number, since it uses less digits than its factorization.

40321005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30300.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 40321005 is about 6349.8822823734. The cubic root of 40321005 is about 342.9076043039.

Adding to 40321005 its reverse (50012304), we get a palindrome (90333309).

The spelling of 40321005 in words is "forty million, three hundred twenty-one thousand, five".